Heat load

{"battery_storage":false,"ev_capacity_constrained":false,"ev_excess_constrained":false,"ev_storage":false,"solar_power_to_heat":false,"solar_power_to_gas":false,"hp_capacity_constrained":false,"hhp_switch_to_gas":false,"postponing_base_load":false,"saving_base_load":false,"capping_solar_pv":false,"capping_fraction":1.0}